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// SPDX-FileCopyrightText: 2013 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
//
// SPDX-License-Identifier: MIT
/*
* This example shows how to enqueue nodes into a wfcqueue.
*/
#include <stdio.h>
#include <stdlib.h>
#include <urcu/wfcqueue.h> /* Wait-free concurrent queue */
#include <urcu/compiler.h> /* For CAA_ARRAY_SIZE */
/*
* Nodes populated into the queue.
*/
struct mynode {
int value; /* Node content */
struct cds_wfcq_node node; /* Chaining in queue */
};
int main(void)
{
int values[] = { -5, 42, 36, 24, };
struct cds_wfcq_head myqueue_head; /* Queue head */
struct cds_wfcq_tail myqueue_tail; /* Queue tail */
unsigned int i;
int ret = 0;
struct cds_wfcq_node *qnode;
cds_wfcq_init(&myqueue_head, &myqueue_tail);
/*
* Enqueue nodes.
*/
for (i = 0; i < CAA_ARRAY_SIZE(values); i++) {
struct mynode *node;
node = malloc(sizeof(*node));
if (!node) {
ret = -1;
goto end;
}
cds_wfcq_node_init(&node->node);
node->value = values[i];
cds_wfcq_enqueue(&myqueue_head, &myqueue_tail,
&node->node);
}
/*
* Show the queue content, iterate in the same order nodes were
* enqueued, from oldest to newest.
*/
printf("myqueue content:");
__cds_wfcq_for_each_blocking(&myqueue_head, &myqueue_tail, qnode) {
struct mynode *node =
caa_container_of(qnode, struct mynode, node);
printf(" %d", node->value);
}
printf("\n");
end:
cds_wfcq_destroy(&myqueue_head, &myqueue_tail);
return ret;
}
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